- 摘 要
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(1 中國建筑西南設(shè)計研究院有限公司， 成都 610042； 2 重慶大學(xué)土木工程學(xué)院, 重慶 400045； 3 重慶大學(xué)山地城鎮(zhèn)建設(shè)與新技術(shù)教育部重點實驗室， 重慶 400045； 4 北京大米未來科技有限公司， 北京 100123； 5 中國市政工程西南設(shè)計研究總院有限公司， 成都 610021；6 成都基準方中建筑設(shè)計有限公司， 成都 610017）
［摘要］在鋼筋混凝土框架中采用混凝土墻替代砌體填充墻，能夠有效地提高填充墻的整體性，顯著降低地震時由于砌體填充墻的破壞造成的人員傷亡和財產(chǎn)損失。但是由于框架填充墻的高寬比一般較小，采用混凝土填充墻極易發(fā)生脆性的剪切破壞。如果在墻體上預(yù)設(shè)豎縫，則有可能將其破壞模式轉(zhuǎn)變?yōu)檠有缘膹澢茐?，從而減少墻體破壞。進行了4個試件的抗震性能試驗，研究了豎縫形式、配筋率等參數(shù)對帶豎縫混凝土填充墻的鋼筋混凝土框架抗震性能影響。結(jié)果表明：設(shè)置豎縫能有效降低混凝土填充墻的抗側(cè)剛度，并將其破壞模式由脆性的剪切破壞轉(zhuǎn)化為延性的彎剪破壞，顯著提高耗能性能和塑性變形能力，研究結(jié)果驗證了這一設(shè)想的可行性。
［關(guān)鍵詞］鋼筋混凝土； 框架結(jié)構(gòu)； 抗震性能； 開縫墻； 填充墻
中圖分類號：TU398-7文獻標(biāo)識碼：A文章編號：1002-848X(2020)22-0071-06
Research on seismic performance of concrete slit infill walls in reinforced concrete frames
FENG Yuan1, ZHANG Chuan2,3, ZHANG Ping4, WANG Xinlei5, GAO Yongdong1, WU Xiaobin1, YUAN Taiping6, XIONG Yaoqing1
（1 China Southwest Architectural Design and Research Institute Co.，Ltd., Chengdu 610042, China； 2 College of Civil Engineering, Chongqing University, Chongqing 400045, China； 3 Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University), Ministry of Education, Chongqing 400045, China； 4 Beijing Da Mi Future Technology Co., Ltd., Beijing 100123, China； 5 China Southwest Municipal Design and Research Institute Co.,Ltd., Chengdu 610021, China； 6 Chengdu JZFZ Architecture Design Institute, Chengdu 610017, China）
Abstract:In reinforced concrete frames, if monolithic concrete walls are used to replace masonry infill, better integrity and out-of-plane stability may be resulted, significant reduction in human life and property losses can be achieved as well. However, such a kind of concrete infill is usually squat, which is susceptible to brittle diagonal shear failure during earthquakes. Therefore, vertical slits are preformed in the wall web of the concrete infill to obtain slender wall piers,by which more ductile bending failure may be induced. Reversed cyclic loading tests of four specimens were carried out to investigate effect of such parameters as the pattern of slits, reinforcement ratio on their seismic behavior. The testing results have shown that preformation of slits on the concrete wall as infill in the reinforced concrete frame can effectively reduce the lateral stiffness of the infill. At the same time, the failure modes are shifted from the brittle shear failure to ductile bending shear failure, and the capacities of seismic energy consumption and plastic deformation are improved. Such a design philosophy has been verified by the experimental findings as a result.
Keywords:reinforced concrete； frame structure； earthquake-resistant performance; slit wall； infill wall
*中國建筑股份有限公司科技研發(fā)基金資助（CSCEC-2-15-Z-42）。
作者簡介：馮遠，教授級高級工程師，Email:xnyfy@vip.163.com； 通信作者：張川，博士，教授，zchuan06@126.com。
